One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,13,15)(11,14,12,16)(17,18)(19,29)(20,26)(21,27)(22,25)(23,28)(24,32)(30,38)(31,45)(33,40)(34,48)(35,43)(36,41)(37,44)(39,46)(42,47)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,19)(18,24)(20,34)(21,33)(22,32)(23,30)(25,29)(26,42)(27,38)(28,40)(31,35)(36,47)(37,46)(39,43)(41,48)(44,45)(9,12,13,11)(10,14,15,16)(18,25)(19,30)(21,23)(24,38)(26,41)(29,40)(31,34)(32,33)(35,37)(39,48)(42,45)(46,47)(17,20,22,36)(18,26,25,41)(19,31,32,46)(21,35,23,37)(24,39,29,45)(27,43,28,44)(30,34,33,47)(38,48,40,42)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,27,25,28)(19,30,32,33)(20,35,36,37)(24,40,29,38)(26,43,41,44)(31,34,46,47)(39,42,45,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.